振动试验量级异常波动的机理及解决方法

Mechanism and Solution of Abnormal Fluctuation of Vibration Test Magnitude

针对振动试验行业内试验控制量级大幅波动的异常现象,进行了控制原理分析,根据分析结果进行了试验验证,试验完全复现了控制量级大幅波动现象,证实了特殊限制谱等导致的超低量级和信号干扰是导致大幅波动的两种直接原因。在确定直接原因的基础上分析了该现象的根本原因,据此提出了解决措施,并对措施进行了验证。结果表明解决措施有效,提高控制自由度和采用输出保持均能有效避免大幅波动情况。该问题的解决有助于提高振动试验控制的稳定性和安全性。

In view of the abnormal phenomenon of large fluctuations of the test control level in the vibration test industry,the control principle is analyzed.According to the analysis results,the test is verified.The test completely repeats the phenomenon of large fluctuations of the control level,and it is confirmed that the ultra-low magnitude and signal interference caused by special limit spectrum are the two direct causes of large fluctuations.On the basis of determining the direct cause,the root cause of the phenomenon is analyzed,and the solution measures are put forward and verified by experiments.The test results show that the solution is effective,and the increase of control freedom and the use of output hold can effectively avoid large fluctuations.The solution of this problem is helpful to improve the stability and safety of vibration test control.